[receiver/sqlserver] Emit correct database name resource attribute (o…

…pen-telemetry#35038)

**Description:** <Describe what has changed.>
<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->
As explained in the bug description, the receiver was incorrectly
setting the database name resource attribute based on the first row
returned from the query. The returned rows may have different database
names, which means metrics were being labeled as being from the wrong
database.

**Link to tracking Issue:** <Issue number if applicable>
Fixes
open-telemetry#35036

**Testing:** <Describe what testing was performed and which tests were
added.>
Updated tests for new expected resource metrics. View changed
`testdata/` files to see changed output.

.chloggen/fix_sqlserver_resource_attrs.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: bug_fix
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: sqlserverreceiver
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Fix bug where metrics were being emitted with the wrong database name resource attribute
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [35036]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: []

receiver/sqlserverreceiver/scraper.go

@@ -80,14 +80,13 @@ func (s *sqlServerScraperHelper) Start(context.Context, component.Host) error {
 func (s *sqlServerScraperHelper) Scrape(ctx context.Context) (pmetric.Metrics, error) {
 	var err error
 
-	rb := s.mb.NewResourceBuilder()
 	switch s.sqlQuery {
 	case getSQLServerDatabaseIOQuery(s.instanceName):
-		err = s.recordDatabaseIOMetrics(ctx, rb)
+		err = s.recordDatabaseIOMetrics(ctx)
 	case getSQLServerPerformanceCounterQuery(s.instanceName):
-		err = s.recordDatabasePerfCounterMetrics(ctx, rb)
+		err = s.recordDatabasePerfCounterMetrics(ctx)
 	case getSQLServerPropertiesQuery(s.instanceName):
-		err = s.recordDatabaseStatusMetrics(ctx, rb)
+		err = s.recordDatabaseStatusMetrics(ctx)
 	default:
 		return pmetric.Metrics{}, fmt.Errorf("Attempted to get metrics from unsupported query: %s", s.sqlQuery)
 	}
@@ -96,7 +95,7 @@ func (s *sqlServerScraperHelper) Scrape(ctx context.Context) (pmetric.Metrics, e
 		return pmetric.Metrics{}, err
 	}
 
-	return s.mb.Emit(metadata.WithResource(rb.Emit())), nil
+	return s.mb.Emit(), nil
 }
 
 func (s *sqlServerScraperHelper) Shutdown(_ context.Context) error {
@@ -106,8 +105,7 @@ func (s *sqlServerScraperHelper) Shutdown(_ context.Context) error {
 	return nil
 }
 
-func (s *sqlServerScraperHelper) recordDatabaseIOMetrics(ctx context.Context, rb *metadata.ResourceBuilder) error {
-	// TODO: Move constants out to the package level when other queries are added.
+func (s *sqlServerScraperHelper) recordDatabaseIOMetrics(ctx context.Context) error {
 	const computerNameKey = "computer_name"
 	const databaseNameKey = "database_name"
 	const physicalFilenameKey = "physical_filename"
@@ -133,11 +131,10 @@ func (s *sqlServerScraperHelper) recordDatabaseIOMetrics(ctx context.Context, rb
 	now := pcommon.NewTimestampFromTime(time.Now())
 	var val float64
 	for i, row := range rows {
-		if i == 0 {
-			rb.SetSqlserverComputerName(row[computerNameKey])
-			rb.SetSqlserverDatabaseName(row[databaseNameKey])
-			rb.SetSqlserverInstanceName(row[instanceNameKey])
-		}
+		rb := s.mb.NewResourceBuilder()
+		rb.SetSqlserverComputerName(row[computerNameKey])
+		rb.SetSqlserverDatabaseName(row[databaseNameKey])
+		rb.SetSqlserverInstanceName(row[instanceNameKey])
 
 		val, err = strconv.ParseFloat(row[readLatencyMsKey], 64)
 		if err != nil {
@@ -159,6 +156,8 @@ func (s *sqlServerScraperHelper) recordDatabaseIOMetrics(ctx context.Context, rb
 		errs = append(errs, s.mb.RecordSqlserverDatabaseOperationsDataPoint(now, row[writeCountKey], row[physicalFilenameKey], row[logicalFilenameKey], row[fileTypeKey], metadata.AttributeDirectionWrite))
 		errs = append(errs, s.mb.RecordSqlserverDatabaseIoDataPoint(now, row[readBytesKey], row[physicalFilenameKey], row[logicalFilenameKey], row[fileTypeKey], metadata.AttributeDirectionRead))
 		errs = append(errs, s.mb.RecordSqlserverDatabaseIoDataPoint(now, row[writeBytesKey], row[physicalFilenameKey], row[logicalFilenameKey], row[fileTypeKey], metadata.AttributeDirectionWrite))
+
+		s.mb.EmitForResource(metadata.WithResource(rb.Emit()))
 	}
 
 	if len(rows) == 0 {
@@ -168,7 +167,7 @@ func (s *sqlServerScraperHelper) recordDatabaseIOMetrics(ctx context.Context, rb
 	return errors.Join(errs...)
 }
 
-func (s *sqlServerScraperHelper) recordDatabasePerfCounterMetrics(ctx context.Context, rb *metadata.ResourceBuilder) error {
+func (s *sqlServerScraperHelper) recordDatabasePerfCounterMetrics(ctx context.Context) error {
 	const counterKey = "counter"
 	const valueKey = "value"
 	// Constants are the columns for metrics from query
@@ -195,9 +194,8 @@ func (s *sqlServerScraperHelper) recordDatabasePerfCounterMetrics(ctx context.Co
 	var errs []error
 	now := pcommon.NewTimestampFromTime(time.Now())
 	for i, row := range rows {
-		if i == 0 {
-			rb.SetSqlserverInstanceName(row[instanceNameKey])
-		}
+		rb := s.mb.NewResourceBuilder()
+		rb.SetSqlserverInstanceName(row[instanceNameKey])
 
 		switch row[counterKey] {
 		case batchRequestRate:
@@ -255,12 +253,14 @@ func (s *sqlServerScraperHelper) recordDatabasePerfCounterMetrics(ctx context.Co
 				s.mb.RecordSqlserverUserConnectionCountDataPoint(now, val)
 			}
 		}
+
+		s.mb.EmitForResource(metadata.WithResource(rb.Emit()))
 	}
 
 	return errors.Join(errs...)
 }
 
-func (s *sqlServerScraperHelper) recordDatabaseStatusMetrics(ctx context.Context, rb *metadata.ResourceBuilder) error {
+func (s *sqlServerScraperHelper) recordDatabaseStatusMetrics(ctx context.Context) error {
 	// Constants are the column names of the database status
 	const dbOnline = "db_online"
 	const dbRestoring = "db_restoring"
@@ -281,10 +281,9 @@ func (s *sqlServerScraperHelper) recordDatabaseStatusMetrics(ctx context.Context
 
 	var errs []error
 	now := pcommon.NewTimestampFromTime(time.Now())
-	for i, row := range rows {
-		if i == 0 {
-			rb.SetSqlserverInstanceName(row[instanceNameKey])
-		}
+	for _, row := range rows {
+		rb := s.mb.NewResourceBuilder()
+		rb.SetSqlserverInstanceName(row[instanceNameKey])
 
 		errs = append(errs, s.mb.RecordSqlserverDatabaseCountDataPoint(now, row[dbOnline], metadata.AttributeDatabaseStatusOnline))
 		errs = append(errs, s.mb.RecordSqlserverDatabaseCountDataPoint(now, row[dbRestoring], metadata.AttributeDatabaseStatusRestoring))
@@ -293,6 +292,7 @@ func (s *sqlServerScraperHelper) recordDatabaseStatusMetrics(ctx context.Context
 		errs = append(errs, s.mb.RecordSqlserverDatabaseCountDataPoint(now, row[dbSuspect], metadata.AttributeDatabaseStatusSuspect))
 		errs = append(errs, s.mb.RecordSqlserverDatabaseCountDataPoint(now, row[dbOffline], metadata.AttributeDatabaseStatusOffline))
 
+		s.mb.EmitForResource(metadata.WithResource(rb.Emit()))
 	}
 
 	return errors.Join(errs...)

receiver/sqlserverreceiver/scraper_test.go

@@ -110,7 +110,8 @@ func TestSuccessfulScrape(t *testing.T) {
 		assert.NoError(t, pmetrictest.CompareMetrics(actualMetrics, expectedMetrics,
 			pmetrictest.IgnoreMetricDataPointsOrder(),
 			pmetrictest.IgnoreStartTimestamp(),
-			pmetrictest.IgnoreTimestamp()))
+			pmetrictest.IgnoreTimestamp(),
+			pmetrictest.IgnoreResourceMetricsOrder()))
 	}
 }